Saturday, May 23, 2015

Global temperature change observed over the last hundred
years or so is well within the natural variability of the last 8,000
years, according to a new paper by a former Intergovernmental Panel On Climate Change (IPCC) lead author.
Dr. Philip Lloyd, a South Africa-based physicist and climate
researcher, examined ice core-based temperature data going back 8,000
years to gain perspective on the magnitude of global temperature changes
over the 20th Century.
What Lloyd found was that the standard deviation of the
temperature over the last 8,000 years was about 0.98 degrees Celsius–
higher than the 0.85 degrees climate scientists say the world has warmed over the last century.
“This suggests that while some portion of the temperature
change observed in the 20th century was probably caused by greenhouse
gases, there is a strong likelihood that the major portion was due to
natural variations,” Lloyd wrote in his study.